IPMI2.0 规范：智能平台管理接口标准

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"IPMI2_0E4_Markup_061209.pdf 是一份关于第二代智能平台管理接口（IPMI）规范的文档，详细描述了IPMI架构的基础规格。此规范定义了标准化、抽象化的平台管理子系统接口，用于扩展在同一主要机箱内的主板之间以及多个机箱之间的平台管理。该文档涵盖了从IPMI v1.0到v2.0的修订历史，旨在提供更高效、智能的远程管理系统。" 《智能平台管理接口（IPMI）规范》第二代v2.0版是针对计算机硬件平台管理和监控的一种开放标准。IPMI的主要目标是提供一个独立于硬件和操作系统的方法，以便对数据中心的服务器进行远程监控和管理。这一规范的制定者包括Intel、Hewlett-Packard、NEC和Dell等业界巨头。 IPMI v1.0的发布标志着这一接口规范的起点，它提供了基础的硬件监控和管理功能，如温度、电压、风扇速度等。随着技术的发展，IPMI经历了多次修订，例如v1.5版本增加了附加功能和错误修正，增强了其灵活性和可靠性。v1.5版本还引入了错误修复，确保了命令如GetChassisStatus的正确执行。 IPMI v2.0是IPMI规范的重大升级，它不仅包含了v1.5的所有特性，还引入了更多高级功能，如更强大的传感器数据记录、事件日志和固件升级机制。此外，v2.0版本提升了安全性，支持安全的KVM（键盘、视频、鼠标）过网操作，使得远程控制更加安全可靠。这些改进使IT管理员能够更加精细化地监控和控制数据中心的环境，提高设备可用性和能效。 IPMI规范的修订历史表明，这个标准不断在根据用户需求和技术进步进行更新。从1998年的v1.0到2004年的v2.0，每个版本都包含了前一版本的错误修复和新增的附加功能，确保了IPMI在实际应用中的稳定性和实用性。 IPMI规范是IT管理领域的重要工具，它通过标准化的接口使得硬件管理变得更加自动化和智能化，有助于降低运营成本，提升数据中心的运维效率。无论是小型服务器集群还是大型数据中心，IPMI都在其中发挥了关键作用，为实现高效、可靠的远程管理奠定了坚实的基础。

Intelligent Platform Management Interface Specification 
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42.1  Event/Reading Type Codes ......................................................................................................................... 498 
42.2  Sensor Type Codes and Data................................................................................................ .......................502 
43.  Sensor Data Record Formats ..........................................................................................................516 
43.1  SDR Type 01h, Full Sensor Record ............................................................................................................517 
43.2  SDR Type 02h, Compact Sensor Record................................................................ .....................................524 
43.3  SDR Type 03h, Event-Only Record ............................................................................................................530 
43.4  SDR Type 08h - Entity Association Record ................................................................................................ 532 
43.5  SDR Type 09h - Device-relative Entity Association Record.......................................................................534 
43.6  SDR Type 0Ah:0Fh - Reserved Records ................................................................ .....................................535 
43.7  SDR Type 10h - Generic Device Locator Record ....................................................................................... 536 
43.8  SDR Type 11h - FRU Device Locator Record ............................................................................................ 537 
43.9  SDR Type 12h - Management Controller Device Locator Record .............................................................. 539 
43.10 SDR Type 13h - Management Controller Confirmation Record .................................................................541 
43.11 SDR Type 14h - BMC Message Channel Info Record ................................................................................542 
43.12 SDR Type C0h - OEM Record.................................................................................................................... 544 
43.13 Device Type Codes................................ ......................................................................................................545 
43.14 Entity IDs................................................................................................ .....................................................547 
43.15 Type/Length Byte Format............................................................................................................................ 548 
43.16 6-bit ASCII Packing Example ................................ ..................................................................................... 549 
43.17 Sensor Unit Type Codes ................................................................................................ .............................. 551 
44.  Examples...........................................................................................................................................553 
44.1  Processor Sensor with Sensor-specific States & Event Generation ................................ ............................. 553 
44.2  Processor Sensor with Generic States & Event Generation .........................................................................555 
Appendix A - Previous Sequence Number Tracking............................................................................557 
Appendix B - Example PEF Mask Compare Algorithm ........................................................................559 
Appendix C1 - Locating IPMI System Interfaces via SM BIOS Tables................................................561 
C1-1  IPMI Device Information - BMC Interface ................................................................................................ .562 
C1-1.1  Interface Type ......................................................................................................................................562 
C1-1.2  IPMI Specification Revision Field .......................................................................................................562 
C1-1.3  I
2
C Slave Address Field................................................................................................ ........................ 562 
C1-1.4  NV Storage Device Address Field........................................................................................................563 
C1-1.5  Base Address Field............................................................................................................................... 563 
C1-1.6  Base Address Modifier Field................................ ................................................................................563 
C1-1.7  System Interface Register Alignment ................................................................ ...................................563 
C1-1.7.1 Byte-spaced I/O Address Examples ................................................................................................ .........563 
C1-1.7.2 32-bit Spaced I/O Address Examples.......................................................................................................563 
C1-1.7.3 Memory-mapped Base Address ...............................................................................................................564 
C1-1.7.4 Interrupt Info Field................................................................ ...................................................................564 
C1-1.8  Interrupt Number Field................................................................ .........................................................564 
Appendix C2 - Locating IPMI System Interfaces on PCI......................................................................565 
Appendix C3 - Locating IPMI System Interfaces with ACPI.................................................................567 
C3-1  SPMI Description Table and ACPI Control Methods ................................................................ .................567 
C3-2  Locating IPMI System Interfaces in ACPI Name Space .............................................................................569 
C3-3  Example IPMI Definition ASL Code ..........................................................................................................571 
Example 1: SMIC Interface in I/O Space................................ ...........................................................................571 
Example 2: KCS Interface in 64-bit Address Space ..........................................................................................571 
Example 3: SMIC Interface in I/O Space................................ ...........................................................................572 
Example 4: SSIF Interface ................................................................................................................................ .573 
Appendix D - Determining Message Size Requirements .....................................................................575 
Appendix E - Terminal Mode Grammar .................................................................................................577 

Intelligent Platform Management Interface Specification 
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List of Figures 
Figure  1-1, IPMI and the Management Software Stack ............................................................................................... 11 
Figure  1-2, IPMI Block Diagram ................................................................................................ .................................12 
Figure  2-1, Intelligent Platform Management Logical Devices ................................................................ ...................28 
Figure  6-1, Session Activation................................................................................................ .....................................56 
Figure  6-2, LAN to IPMB Bridged Request Example .................................................................................................66 
Figure  7-1, IPMB Request sent using Send Message Command ................................................................ .................72 
Figure  7-2, Send Message Command Response ..........................................................................................................72 
Figure  7-3, Response for Set Event Receiver in Receive Message Queue...................................................................73 
Figure  7-4, Get Message Command Response................................................................ .............................................73 
Figure  9-1, KCS Interface/BMC Request Message Format ................................ .........................................................79 
Figure  9-2, KCS Interface/BMC Response Message Format................................................................ .......................80 
Figure  9-3, KCS Interface Event Request Message Format......................................................................................... 80 
Figure  9-4, KCS Interface Event Response Message Format ................................................................ ......................80 
Figure  9-5, KCS Interface Registers ................................................................................................ ............................ 82 
Figure  9-6, KCS Interface SMS to BMC Write Transfer Flow Chart................................ ..........................................88 
Figure  9-7, KCS Interface BMC to SMS Read Transfer Flow Chart................................................................ ...........89 
Figure  9-8, Aborting KCS Transactions in-progress and/or Retrieving KCS Error Status ..........................................90 
Figure  10-1, SMIC/BMC Interface Registers ................................................................................................ ..............95 
Figure  10-2, SMIC/BMC Request Message Format ................................................................ ..................................103 
Figure  10-3, SMIC/BMC Response Message Format................................................................................................ 104 
Figure  10-4, SMIC Event Request Message Format................................................................ ..................................104 
Figure  10-5, SMIC Event Response Message Format ................................ ............................................................... 104 
Figure  11-1, BT Interface/BMC Request Message Format........................................................................................ 105 
Figure  11-2, BT Interface/BMC Response Message Format .....................................................................................106 
Figure  11-3, BT Interface Event Request Message Format .......................................................................................107 
Figure  11-4, BT Interface Event Response Message Format..................................................................................... 107 
Figure  11-5, BT_CTRL Register format....................................................................................................................109 
Figure  11-6, BT_INTMASK Register format............................................................................................................111 
Figure  13-1, Embedded LAN Controller Implementation ......................................................................................... 125 
Figure  13-2, PCI Management Bus Implementation................................................................................................ ..126 
Figure  13-3, IPMI LAN Packet Layering ..................................................................................................................133 
Figure  13-4, IPMI LAN Message Formats ................................ ................................................................................138 
Figure  13-5, IPMI v1.5 LAN Session Startup................................................................ ............................................144 
Figure  14-1, Serial Port Sharing Logical Diagram................................................................ .....................................168 
Figure  14-2, Basic Mode Message Fields ..................................................................................................................181 
Figure  14-3, PPP Frame Format ................................................................................................ ................................ 183 
Figure  14-4, Configure-Request, -Ack, -Nak, -Reject Packet Format........................................................................184 
Figure  14-5, IPMI Message in PPP Frame Format ................................................................................................ ....187 
Figure  14-6, IP Frame with Field Compression ................................ .........................................................................188 
Figure  14-7, Terminal Mode Request to BMC ................................ ..........................................................................194 
Figure  14-8, Terminal Mode Response from BMC ...................................................................................................194 
Figure  14-9, Terminal Mode Request to SMS ...........................................................................................................196 
Figure  14-10, Terminal Mode Response from SMS ................................................................................................ ..196 
Figure  14-11, Send Message Command for Bridged Request ...................................................................................196 
Figure  14-12, Response to Send Message Command for Bridged Request ................................ ............................... 196 
Figure  14-13, Bridged Response to Remote Console ................................................................ ................................ 196 
Figure  15-1, SOL with Serial Port Sharing ................................................................................................................207 
Figure  17-1, Alert Processing Example ................................................................................................ .....................233 

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Figure  17-2, Event Filter, Alert Policy, and Alert Destination, & String Relationships ............................................234 
Figure  20-1, Broadcast Get Device ID Request Message ..........................................................................................252 
Figure  29-1, IPMB Event Request Message Format................................................................ ..................................400 
Figure  29-2, Example SMIC Event Request Message Format...................................................................................401 
Figure  35-1, High-Going and Low-Going Event Assertion/Deassertion Points.........................................................461 
Figure  39-1, Sensor to FRU Lookup................................................................................................ .......................... 489 
Figure  43-1, 6-bit Packed ASCII Example ................................................................................................................550 
Figure B-1, Example Event Data Comparison Algorithm.......................................................................................... 559 
Figure D-1, SMBus Write-Block by Master Write-Read through KCS/SMIC.......................................................... 575 
Figure  D-2, Master Write-Read Response via KCS/SMIC................................ .......................................................575 
Figure  D-3, Get Message Response via KCS/SMIC................................ .................................................................575 
Figure  D-4, Master Write-Read Request via LAN/PPP................................................................ ............................ 576 
Figure  D-5 Master Write-Read Response via LAN/PPP ................................................................ .......................... 576 
Figure  D-6, Master Write-Read Response via LAN/PPP .........................................................................................576 
 

Intelligent Platform Management Interface Specification 
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List of Tables 
Table  1-1, Glossary........................................................................................................................................................5 
Table  3-1, Required BMC Functions...........................................................................................................................32 
Table  5-1, Network Function Codes ................................ ............................................................................................ 38 
Table  5-2, Completion Codes ......................................................................................................................................40 
Table  5-3, Sensor Owner ID and Sensor Number Field Definitions ............................................................................43 
Table  5-4, System Software IDs ................................................................................................ ..................................43 
Table  6-1, Channel Number Assignments................................................................................................ ....................46 
Table  6-2, Channel Protocol Type Numbers................................................................ ................................................47 
Table  6-3, Channel Medium Type Numbers................................................................ ................................................48 
Table  6-4, Channel Access Modes............................................................................................................................... 49 
Table  6-5, Channel Privilege Levels............................................................................................................................ 50 
Table  6-6, Session-less , Single-session and Multi-session Characteristics .................................................................55 
Table  6-7, Default Session Inactivity Timeout Intervals................................................................ .............................. 60 
Table  6-8, Message Bridging Mechanism by Source and Destination.........................................................................64 
Table  6-9, IPMI Message and IPMB / Private Bus Transaction Size Requirements ................................ ...................68 
Table  7-1, BMC IPMB LUNs......................................................................................................................................71 
Table  8-1, System Interface Request For Delivering Remote IPMB Request via ICMB ............................................76 
Table  8-2, Send Message Response............................................................................................................................. 76 
Table  8-2a, Get Message Response Data for Remote IPMB Request Delivered via ICMB ................................ ........76 
Table  8-3, IPMB Request For Delivering Remote IPMB Request via ICMB ............................................................. 77 
Table  8-4, Send Message Response............................................................................................................................. 77 
Table  8-5, IPMB Response For Remote IPMB Request Delivered via ICMB ............................................................ 77 
Table  9-1, KCS Interface Status Register Bits................................ .............................................................................83 
Table  9-2, KCS Interface State Bits............................................................................................................................. 83 
Table  9-3, KCS Interface Control Codes ................................................................ .....................................................84 
Table  9-4, KCS Interface Status Codes .......................................................................................................................84 
Table  10-1, SMIC Flags Register Bits ......................................................................................................................... 96 
Table  10-2, SMS Transfer Stream control codes ................................ .......................................................................101 
Table  10-3, SMS Transfer Stream Status Codes................................................................................................ ........102 
Table  11-1, BT Interface Registers................................ ............................................................................................ 108 
Table  11-2, BT_CTRL Register Bit Definitions................................................................ ........................................109 
Table  11-3, BT_INTMASK Register Bit Definitions................................ ................................................................ 111 
Table  11-4, BT Interface Write Transfer ................................ ...................................................................................112 
Table  11-5, BT Interface Read Transfer .................................................................................................................... 113 
Table  12-1, BMC Single-part Write ..........................................................................................................................116 
Table  12-2, BMC Multi-part Write Start ...................................................................................................................117 
Table  12-3, BMC Multi-part Write Middle ...............................................................................................................117 
Table  12-4, BMC Multi-part Write End ................................................................ ....................................................117 
Table  12-5, BMC Single-part Read ................................................................................................ ........................... 117 
Table  12-6, BMC Multi-part Read Start .................................................................................................................... 118 
Table  12-7, BMC Multi-part Read Middle ................................................................ ................................................118 
Table  12-8, BMC Multi-part Read Retry................................................................................................................... 118 
Table  12-9, BMC Multi-part Read End ................................................................................................ .....................118 
Table  12-10, Summary of SMBus Commands for SSIF ............................................................................................ 122 
Table  12-11, SSIF Commands................................................................................................................................ ...122 
Table  12-12, SSIF Timing Specifications..................................................................................................................122 
Table  13-1, RMCP Port Numbers.............................................................................................................................. 127 
Table  13-2, RMCP Message Format................................ .......................................................................................... 128 